What is the value of each expression if you substitute 7 in for b 8b+18 and 2(4b+9)

1) c 2143.6 cm

2) c 113.0 m

3) a 33.5 ft

4)   d 2 cm

5) c 20 mm

6) 180 in

7) d 120 ft

lockers 1, 4, 9, 16, 25, 40, and 49 are open

i ran through it by the other answer is wrong

1) 2/5

2) zero=0/1

3) zero=0/2

4) -4/5

5) undefined=3/0